After all the work of putting 6x9's in, the amp has, all of a sudden, decided to start to whine in time with the revs.
When I installed the amp, I ensured the power was seperate from the RCA leads. The power lead runs down the left side of the car; the 12v ignition runs inside the centre plastic console then across under the passenger seat then back to the amp with tyhe power lead. The RCAs run down the console, under the drivers seat then back along the right side of the car. What can be causing this and how do I go about rectifying

 

How cheap were the rca leads ?
I had problems with the leads supplied withe those amp wiring kits, I orderd some berolina leads from www.potn.co.uk and they stopped all the noise.

How long is the earth lead on the amp? the shorter the better > make sure it is nice and thick i used 8 gauge for mine.